A team of researchers from the King Abdullah University of Science and Technology (KAUST) of the Kingdom of Saudi Arabia has reported a perovskite-based phosphor-based white light converter with a modulation bandwidth around 40 times higher than common LED phosphors. This result could put an end to today's VLC bottleneck when using white LEDs.
By mixing solution-processed CsPbBr3 perovskite nanocrystals (NCs) with a conventional red phosphor, they obtained what they describe as a perovskite-based phosphor white light converter with a modulation bandwidth of 491MHz, which could support high data rate up to 2 Gbit/s, much faster than Wi-Fi. In addition to exhibiting a shorter excited lifetime, the red phosphor and perovskite composite material yields a white light with a high colour rendering index of 89 and a correlated colour temperature of 3236 K, which makes the white LED suitable for comfort lighting applications.
